CH178122A - Process for the production of an indigoid dye. - Google Patents

Process for the production of an indigoid dye.

Info

Publication number
CH178122A
CH178122A CH178122DA CH178122A CH 178122 A CH178122 A CH 178122A CH 178122D A CH178122D A CH 178122DA CH 178122 A CH178122 A CH 178122A
Authority
CH
Switzerland
Prior art keywords
production
dye
indigoid dye
bromo
dimethyl
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH178122A publication Critical patent/CH178122A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B7/00—Indigoid dyes
    • C09B7/08—Other indole-indigos

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)

Description

  

  Verfahren zur Herstellung eines     indigoiden    Farbstoffes.    Es wurde gefunden, dass man einen     indi-          goiden    Farbstoff erhalten kann, wenn man  die reaktionsfähigen     a-Derivate-    des     4.7-          Dimethyl-5-bromisatius    mit     4-Bro@m-l-oxy-          naphthalin        kondeneiert.     



  Der Farbstoff der Formel  
EMI0001.0010     
    stellt ein dunkelblaues kristallinisches Pul  ver dar, das sich in konzentrierter Schwefel  säure mit grüner Farbe löst und beim Be  drucken der Baumwolle sehr echte blaue  Töne ergibt.  



       Beispiel:     \?5,4 Teile     5-Brom-4.        7-dimethylisatin     werden durch Erwärmen mit 300 Teilen    Chlorbenzol und 22 Teilen     Phosphorpenta-          ,chlorid    in das     5-Brom-4.        7-dimethylisatin-a-          chlorid        übergeführt    und mit einer bei 45 bis  50   hergestellten Lösung von     22;3    Teilen       4-Brom-l-oxynaphthalin    in 5.00 Teilen Chlor  benzol vereinigt.

   Der     als,    dunkelblaues     Kri-          stallpulver    sich     ausscheidende    Farbstoff     wird     filtriert, mit Chlorbenzol,     sowie    mit Alkohol  gewaschen     und        getrocknet.       Zu demselben Farbstoffe gelangt man,  wenn     statt    in     chlorbenzolischer    Lösung in       wässerigem    Medium     gearbeitet    wird, oder  wenn an Stelle des 4.

       7-Dimethyl-5-bromisa-          tin-a--chlo@rid,s    das     4.7-Dimethyl-5-bramisa-          tin-a-anilid    in     Essigsäureanhydrid    mit     4-          Bro@m-l-oxynaphthalin    erhitzt wird.



  Process for the production of an indigoid dye. It has been found that an indigoid dye can be obtained if the reactive α-derivatives of 4,7-dimethyl-5-bromisatius are condensed with 4-bromine-1-oxynaphthalene.



  The dye of the formula
EMI0001.0010
    is a dark blue crystalline powder that dissolves in concentrated sulfuric acid with a green color and produces very real blue tones when the cotton is printed.



       Example: 5.4 parts 5-bromo-4. 7-dimethylisatin are converted into 5-bromo-4 by heating with 300 parts of chlorobenzene and 22 parts of phosphorus penta-, chloride. 7-dimethylisatin-a-chloride and combined with a solution prepared at 45 to 50 of 22; 3 parts of 4-bromo-1-oxynaphthalene in 5.00 parts of chlorobenzene.

   The dye which separates out as a dark blue crystal powder is filtered, washed with chlorobenzene and with alcohol and dried. The same dyestuff is obtained when working in an aqueous medium instead of in a chlorobenzene solution, or when instead of the 4th

       7-dimethyl-5-bromizatin-a-chloride, the 4,7-dimethyl-5-bromizatin-a-anilide in acetic anhydride is heated with 4-Bromizine-1-oxynaphthalene.

Claims (1)

PATENTANSPRUCH: Verfahren. zur Herstellung einest indigoi- ,den Farbstoffes, dadurch gekennzeichnet, dass man ,die reaktionefähigen a-Derivate des 4.7-Dimethyl-5-bromisatins mit 4-Brom-l- ogynaphthalin kondensiert. Der Farbstoff EMI0002.0005 stellt eindunkelblaues, kristallinisches Pul ver dar, das, PATENT CLAIM: Process. for the production of one indigo, the dye, characterized in that the reactive α-derivatives of 4,7-dimethyl-5-bromoisatin are condensed with 4-bromo-l-ogynaphthalene. The dye EMI0002.0005 represents dark blue, crystalline powder that, sich in konzentrierter Schwefel säure mit grüner Farbe löst und beim Be drucken der Baumwolle sehr echte blaue Töne ergibt. dissolves in concentrated sulfuric acid with a green color and produces very real blue tones when the cotton is printed.
CH178122D 1934-04-21 1934-04-21 Process for the production of an indigoid dye. CH178122A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH178122T 1934-04-21
CH176363T 1934-04-21

Publications (1)

Publication Number Publication Date
CH178122A true CH178122A (en) 1935-06-30

Family

ID=25719847

Family Applications (1)

Application Number Title Priority Date Filing Date
CH178122D CH178122A (en) 1934-04-21 1934-04-21 Process for the production of an indigoid dye.

Country Status (1)

Country Link
CH (1) CH178122A (en)

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